Mold for casting printers  leads



(No Model) H. C. HANSEN.

MoLD FOR CASTING PRINTERS LEADS.

2%. N rimdm WT y ' is carried out as t IINrTnn STATES PATENT Ormea.

HANS O. HANSEN, OF BOSTON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 327,546, dated October6, 1885.

Application filed April 14, 1884. Serial No. 127,9l5. (No model.)

.To @ZZ whom, t 771/603/ concern:

Be it known that I, HANS O. HANSEN, a citizen of the United States,residing at Boston, in the county ot' Suffolk and State ofMassachusetts, have invented certain new and useful Improvements inMolds for Casting Printers Leads; and I do hereby declare that the sameare fully described in the following specification, and illustrated inthe accompanying drawings.

This invention relates to improvements in molds for casting printersleads, 83e., and it 'ollows, reference being had to the accompanyingdrawings, where- Figure l represents a side elevation of the improvedmolds, shown as supported in a suitable bracket. Fig. 2 represents aplan view. Fig. 3 represents a front view, seen from X in Fig. l. Fig. 4represents a crosssection on the line A Bshown in Fig. 3. Fig. 5represents a vertical section on the line C D shown in Fig. l; and Fig.6 represents a side elevation of the middle mold7 shown as beingdetached from the side molds.

Similar letters refer to similar parts whereever they occur on thedifferent parts of the drawings.

Heretofore printers7 leads have been cast in molds divided vertically intwo equal parts, held together by means of a suitable clamping deviceduring the act of casting the leads, 85e., and after the leads are castand partially cooled the molds are separated and the leads removed fromthe molds, and in so doing it is usually necessary to use a pair ofnippers to take hold of the upper end of the lead and pull` it out ofthemold. This is objectionable and is one ofthe effectsthat I obviate bythe use of my improved molds. Another objection to the ordinary moldsfor this purposeis that they are liable to cool too rapidly at theirlower ends and thereby preventing the leads from being successfullycast. By the use of my improved molds the capacity for doing the work ismaterially increased, as will now be more fully shown and described.

My improved molds are made in three separate parts, viz: a central ormiddle one, c, and a pair of side molds, b b, as shown, the latter beingsupported in a suitable bracket or rest, c, of any of the usual forms,constructed in such a manner as to permit said side molds to be moved ina lateral direction to and from each other, and the central mold, a,held between them, and to be clamped firmly against opposite sides ofsaid central or middle mold, a, during the process of casting the leads.

The expansive bracket or clamping-rest is preferably composed of a pairof forked arms, e, that are hinged at c to a stationary support, c. Theforward ends of the forked arms c c are inserted in bearingpieces In*bt, secured to the outside of the side molds, b b, as shown. In thismanner the side molds, b b, may be expanded from each other by swingingthe forked arms c around the fulcrum c, so as to permit the center mold,a, to be removed. During the operation of casting the leads the centermold, a, is confined between the side molds, b Z, by means of a cam orlever, c3, (shown in Fig. 1,) or in any oth er well-known manner. Lugsc* are attached to one of the forked arms c, and the cam c3 is hinged inthese lugs by means of a pin, c5, the other forked arm c being situatedbetween this cam and the first-mentioned arm c. Operation of the camforces the arms toward each other.

I wish to state that the expansive bracket or clamping-rest c forms nopart of my present invention, as such a bracket is well known in theart, and I therefore do not wish to confine myself to the particularkind of bracket shown in Fig. l, as any ofthe ordinary kind maybe usedwith my improved molds. The interior face of each side mold b is madeperfectly smooth and plain, without any grooves or re cesses, as shownin Figs. 4 and 5, except at the upper end, where each side mold b ismade with a flaring mouth, b, to facilitate the molten metal beingpoured into the spaces between the side and central molds. The centralmold, a, has on its opposite faces one or more vertical recessses, a a,each of the proper width and depth for the desired size lead that is tobe cast. In the drawings two such recesses a a are shown on each face ofthe lcentral mold, a, but more or less may be used, according tocircumstances. The central mold, a, terminates in its upper end as adividing edge or wall, a, projecting a little above the upper ends ofthe side molds, b b, so as to prevent the metal poured in at the top ofthe molds from uniting at this place,

IOO

shown in Figs. l, 2, 4, and 6, such enlargementsserving as stops againstthe front edges of the side molds, b b. to enable the operator to placethe central mold in its proper position corresponding to that of theside n'molds when the apparatus is to be used, and when in such positionone of the projections d is made to rest on a projection, b, secured tothe front edge of one of the side molds, b, as shown in Figs. l and 3. 1

d is a wooden handle attached to the outerY ends of the metaly bars d(l, for the operator to take hold ofv while manipulating the centralmold, a.

I prefer to make the outside of the side molds, b b, tapering, as shownin Figs. 3 and 5, so as toretain a uniform and proper heat during theoperation of casting the leads; but I do not wish to confine myself tothis eX- act shape of said side molds.

Ihe upper end of each side mold b is pro# vided with a head orprojection, b, of a suitable size and form. Such head may be cast in onepiece with its respective side mold, or

riveted or otherwise secured to it, as may be desired, such projectionbeing made for the purpose of increasing the mass of each side mold ator near its upper end, and thereby to distribute the desired heat moreuniformly and to aid in cooling the leadsin arapid manner at such upperend after being cast in the molds.

In using my improved molds I proceed as follows: Ve will suppose thatthe molds are smoked on their insides, as usual, and heated to thedesired temperature. I then insert the central mold, c, between the sidemolds, b b, and clamp them together in position, as shown in Figs. l, 2,3, 4, and 5. I then pour the molten metal into the mouths b b, causingthe recesses c c on opposite sides of the central mold, a, to be lled,the air and a small pora tion of the metal escaping through the bottomholes 0r grooves, a3 co3, as usual. As soon as the metal is sufficientlycooled, I release the side molds, b b, from contact with the centralmold, a, and expand the former sufficiently to enable the central mold,a, and the leads cast in its recesses aato be readily disengaged fromthe side molds, and by taking hold of the handle d" I turn the centralmold over,

first on one side and then on the other, and

shake out the leads from opposite sides of said cent-ral mold withoutthe need of pulling them out by means of nippers or equivalent tools. Assoon as the leads are disengaged, as above, from the recesses c a', inthe central mold, a, I reinsert the latter in position between the sidemolds, bb, and clamp the three molds together, as at first, and continueto cast another set of leads, and so on.

It will be seen that with my invention I double or more than double thecapacity of the molds for doing the work, and I dispense with the use ofnippers or other tools for disengaging the leads from the molds, thussaving a great deal of unnecessary labor.

By the construction of the side molds, b b, with upper enlargements, b3b3, as described, I am able to retain a uniform temperature of saidmolds, and thus prevent the casting of imperfect leads.

Having thus fully described the nature, construction, and operation ofmy invention, I wish to secure by Letters Patent, and claim- 1. Incombination, the side molds, bb, and the central mold c, having one ormore recesses, a', on its opposite faces, and a handle, d, secured toits front edge, as and for the purpose set forth.

2. In combination, the central mold, c, having one or more recesses, aa', on each side, and an upper dividing-edge, a, projecting above" thetop of the side molds, with the side molds, b b, and the flaring mouthsbl b' in their upper ends, substantially in a manner and for the purposeset forth.

In testimony whereof I affix my signature in presence of two witnesses.

HANS C. HANSEN.

Witnesses:

ALBAN ANDRN,

HENRY GHADBOURN.

